Question

A ray of light strikes a plane mirror such that its angle of incidence is 30°. What angle does the reflected ray make with the mirror surface?

Answer 1

The reflected ray makes an angle of 60^o with the mirror surface because:
 angle of incidence = angle of reflection = 30^o,  and
 angle of the reflected ray with the mirror surface = 90^o - angle of reflection = 90^o - 30^o = 60^o